diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 9a5dd0d..3012b7c 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -172,7 +172,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
     minitest (5.24.1)
-    msgpack (1.7.2)
+    msgpack (1.8.2)
     net-imap (0.6.4.1)
       date
       net-protocol